Head rest for a folding chair



FIG. 1 is a perspective view of the head rest for a folding chair embodying the design of the present invention;

FIG. 2 is a side elevational view thereof, the side opposite being a mirror image of the side shown in FIG. 2;

FIG. 3 is an end elevational view thereof; and,

FIG. 4 is a top plan view thereof, the bottom having surface decoration that is identical to the top surface decoration shown in FIG. 4. 

The ornamental design for a head rest for a folding chair, as shown and described. 